Questions on why major stretch on some of my strains this run

J

jaked3800

Active Member
I'm in week 4 of flower running 6 strains (all of which ive run before) And a couple of those strains are stretching like crazy compared to previous runs with them. I was running higher humidity than normal through week 3 where I was at 83 degrees F and 65-70% RH I have brought that down to 60% start of week 4. Majority of my strains are just fine but those 2 super stretchy and smaller than normal bud sites. I thought I might have a light leak but everything was good.

Any thoughts appreciated.

Running
HLG 650's
Pro Mix HP
Bio Bizz
1400ppm CO2
Hand watering every 4 days with heavy drybacks
 
C

cage

Well-Known Member
jaked3800 said:
I'm in week 4 of flower running 6 strains (all of which ive run before) And a couple of those strains are stretching like crazy compared to previous runs with them. I was running higher humidity than normal through week 3 where I was at 83 degrees F and 65-70% RH I have brought that down to 60% start of week 4. Majority of my strains are just fine but those 2 super stretchy and smaller than normal bud sites. I thought I might have a light leak but everything was good.

Any thoughts appreciated.

Running
HLG 650's
Pro Mix HP
Bio Bizz
1400ppm CO2
Hand watering every 4 days with heavy drybacks
Click to expand...
Well the usual things that affect the stretching apart from the light spectrum (especially if using same light)
is the N/P ratio and temperature difference between day and night.

I haven't yet experimented far enough to tell you which of these mechanisms would bring the biggest difference.
Higher humidity could increase the leaf temperature if the plant would have trouble transpiring the moisture off.
And since transpiring moisture lowers the leaf temp, the actual leaf temps could be higher what you had previously.

So assuming you would've been feeding pretty similar to previous runs,
I'd take a good look on the temperature difference between the night/day to rule it out.

Higher day temp vs cooler night temp = normal stretch
Similar day temp vs night = less stretch
Lower day temp vs night = even less stretch
 
J

jaked3800

Active Member
cage said:
Well the usual things that affect the stretching apart from the light spectrum (especially if using same light)
is the N/P ratio and temperature difference between day and night.

I haven't yet experimented far enough to tell you which of these mechanisms would bring the biggest difference.
Higher humidity could increase the leaf temperature if the plant would have trouble transpiring the moisture off.
And since transpiring moisture lowers the leaf temp, the actual leaf temps could be higher what you had previously.

So assuming you would've been feeding pretty similar to previous runs,
I'd take a good look on the temperature difference between the night/day to rule it out.

Higher day temp vs cooler night temp = normal stretch
Similar day temp vs night = less stretch
Lower day temp vs night = even less stretch
Click to expand...
The temp spread was about 7-9 degrees from 86 to 77 ish so nothing to crazy. And yes same lights, same nutrient regimen.
 
J

jaked3800

Active Member
cage said:
Well the usual things that affect the stretching apart from the light spectrum (especially if using same light)
is the N/P ratio and temperature difference between day and night.

I haven't yet experimented far enough to tell you which of these mechanisms would bring the biggest difference.
Higher humidity could increase the leaf temperature if the plant would have trouble transpiring the moisture off.
And since transpiring moisture lowers the leaf temp, the actual leaf temps could be higher what you had previously.

So assuming you would've been feeding pretty similar to previous runs,
I'd take a good look on the temperature difference between the night/day to rule it out.

Higher day temp vs cooler night temp = normal stretch
Similar day temp vs night = less stretch
Lower day temp vs night = even less stretch
Click to expand...
Also just seeing today that of the 9 Wedding Pie that I have 1 of them stacked up nice and the other 8 are stretched 12-16 inches above it. Super strange...
 
C

cage

Well-Known Member
jaked3800 said:
Also just seeing today that of the 9 Wedding Pie that I have 1 of them stacked up nice and the other 8 are stretched 12-16 inches above it. Super strange...
Click to expand...
Well if all the obvious reasons don't seem to match for the issue,
what about the actual medium?
Pro Mix HP isn't itself familiar to me, but comes advertised as high drainage, air porosity and low water retention.
So any chance the medium itself is different from the others? Like is the medium compacted similarly?
Some might be drying earlier or so?

Now that I reviewed your first post, one more thing comes to mind.
Did you start from seeds?
I mean even if the breeder has stabilized their strain somewhat, there is still gonna be plenty of different phenotypes in it.
Could be just different phenos?
 
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